// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package net_test

import (
	"io"
	"log"
	"net"

	xnet "github.com/m3db/m3/src/x/net"
	"github.com/m3db/m3/src/x/retry"
)

func ExampleStartForeverAcceptLoop() {
	// Create a new listener.
	l, err := net.Listen("tcp", ":0")
	if err != nil {
		log.Fatal(err)
	}
	defer l.Close()

	// Start accepting incoming connections.
	var (
		opts          = retry.NewOptions()
		connCh, errCh = xnet.StartAcceptLoop(l, opts)
	)

	for {
		select {
		case conn := <-connCh:
			// Handle the connection in a new goroutine.
			go func(c net.Conn) {
				io.Copy(c, c)
				c.Close()
			}(conn)

		case err := <-errCh:
			// Only fatal errors are returned on errCh.
			log.Fatal(err)
		}
	}
}
